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// Copyright (C) 2017 The Android Open Source Project
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
package com.google.gerrit.server.restapi.project;
import com.google.common.collect.ImmutableList;
import com.google.common.collect.ImmutableSet;
import com.google.common.collect.Iterables;
import com.google.gerrit.common.data.GlobalCapability;
import com.google.gerrit.entities.AccessSection;
import com.google.gerrit.entities.AccountGroup;
import com.google.gerrit.entities.GroupDescription;
import com.google.gerrit.entities.GroupReference;
import com.google.gerrit.entities.LabelType;
import com.google.gerrit.entities.Permission;
import com.google.gerrit.entities.PermissionRule;
import com.google.gerrit.entities.Project;
import com.google.gerrit.exceptions.InvalidNameException;
import com.google.gerrit.extensions.api.access.AccessSectionInfo;
import com.google.gerrit.extensions.api.access.PermissionInfo;
import com.google.gerrit.extensions.api.access.PermissionRuleInfo;
import com.google.gerrit.extensions.restapi.AuthException;
import com.google.gerrit.extensions.restapi.BadRequestException;
import com.google.gerrit.extensions.restapi.ResourceConflictException;
import com.google.gerrit.extensions.restapi.UnprocessableEntityException;
import com.google.gerrit.server.IdentifiedUser;
import com.google.gerrit.server.config.AllProjectsName;
import com.google.gerrit.server.group.GroupResolver;
import com.google.gerrit.server.permissions.PermissionBackendException;
import com.google.gerrit.server.permissions.PluginPermissionsUtil;
import com.google.gerrit.server.project.ProjectConfig;
import com.google.gerrit.server.project.RefPattern;
import com.google.inject.Inject;
import com.google.inject.Provider;
import com.google.inject.Singleton;
import java.util.List;
import java.util.Map;
@Singleton
public class SetAccessUtil {
private final GroupResolver groupResolver;
private final AllProjectsName allProjects;
private final Provider<SetParent> setParent;
private final PluginPermissionsUtil pluginPermissionsUtil;
@Inject
private SetAccessUtil(
GroupResolver groupResolver,
AllProjectsName allProjects,
Provider<SetParent> setParent,
PluginPermissionsUtil pluginPermissionsUtil) {
this.groupResolver = groupResolver;
this.allProjects = allProjects;
this.setParent = setParent;
this.pluginPermissionsUtil = pluginPermissionsUtil;
}
ImmutableList<AccessSection> getAccessSections(
Map<String, AccessSectionInfo> sectionInfos, boolean rejectNonResolvableGroups)
throws UnprocessableEntityException {
if (sectionInfos == null) {
return ImmutableList.of();
}
ImmutableList.Builder<AccessSection> sections =
ImmutableList.builderWithExpectedSize(sectionInfos.size());
for (Map.Entry<String, AccessSectionInfo> entry : sectionInfos.entrySet()) {
if (entry.getValue().permissions == null) {
continue;
}
AccessSection.Builder accessSection = AccessSection.builder(entry.getKey());
for (Map.Entry<String, PermissionInfo> permissionEntry :
entry.getValue().permissions.entrySet()) {
if (permissionEntry.getValue().rules == null) {
continue;
}
Permission.Builder p = Permission.builder(permissionEntry.getKey());
if (permissionEntry.getValue().exclusive != null) {
p.setExclusiveGroup(permissionEntry.getValue().exclusive);
}
for (Map.Entry<String, PermissionRuleInfo> permissionRuleInfoEntry :
permissionEntry.getValue().rules.entrySet()) {
GroupDescription.Basic group = groupResolver.parseId(permissionRuleInfoEntry.getKey());
GroupReference groupReference;
if (group != null) {
groupReference = GroupReference.forGroup(group);
} else {
if (rejectNonResolvableGroups) {
throw new UnprocessableEntityException(
permissionRuleInfoEntry.getKey() + " is not a valid group ID");
}
AccountGroup.UUID uuid = AccountGroup.UUID.parse(permissionRuleInfoEntry.getKey());
groupReference = GroupReference.create(uuid, uuid.get());
}
PermissionRuleInfo pri = permissionRuleInfoEntry.getValue();
PermissionRule.Builder r = PermissionRule.builder(groupReference);
if (pri != null) {
if (pri.max != null) {
r.setMax(pri.max);
}
if (pri.min != null) {
r.setMin(pri.min);
}
if (pri.action != null) {
r.setAction(GetAccess.ACTION_TYPE.inverse().get(pri.action));
}
if (pri.force != null) {
r.setForce(pri.force);
}
}
p.add(r);
}
accessSection.addPermission(p);
}
sections.add(accessSection.build());
}
return sections.build();
}
/**
* Checks that the removals and additions are logically valid, but doesn't check current user's
* permission.
*/
void validateChanges(
ProjectConfig config, List<AccessSection> removals, List<AccessSection> additions)
throws BadRequestException, InvalidNameException {
// Perform permission checks
for (AccessSection section : Iterables.concat(additions, removals)) {
boolean isGlobalCapabilities = AccessSection.GLOBAL_CAPABILITIES.equals(section.getName());
if (isGlobalCapabilities) {
if (!allProjects.equals(config.getName())) {
throw new BadRequestException(
"Cannot edit global capabilities for projects other than " + allProjects.get());
}
}
}
// Perform addition checks
for (AccessSection section : additions) {
String name = section.getName();
boolean isGlobalCapabilities = AccessSection.GLOBAL_CAPABILITIES.equals(name);
if (!isGlobalCapabilities) {
if (!AccessSection.isValidRefSectionName(name)) {
throw new BadRequestException("invalid section name");
}
RefPattern.validate(name);
// Check all permissions for soundness
for (Permission p : section.getPermissions()) {
if (!isPermission(p.getName())) {
throw new BadRequestException("Unknown permission: " + p.getName());
}
}
} else {
// Check all permissions for soundness
for (Permission p : section.getPermissions()) {
if (!isCapability(p.getName())) {
throw new BadRequestException("Unknown global capability: " + p.getName());
}
}
}
}
}
void applyChanges(
ProjectConfig config, List<AccessSection> removals, List<AccessSection> additions) {
// Apply removals
for (AccessSection section : removals) {
if (section.getPermissions().isEmpty()) {
// Remove entire section
config.remove(config.getAccessSection(section.getName()));
continue;
}
// Remove specific permissions
for (Permission p : section.getPermissions()) {
if (p.getRules().isEmpty()) {
config.remove(config.getAccessSection(section.getName()), p);
} else {
for (PermissionRule r : p.getRules()) {
config.remove(config.getAccessSection(section.getName()), p, r);
}
}
}
}
// Apply additions
for (AccessSection section : additions) {
config.upsertAccessSection(
section.getName(),
existingAccessSection -> {
for (Permission p : section.getPermissions()) {
Permission currentPermission =
existingAccessSection.build().getPermission(p.getName());
if (currentPermission == null) {
// Add Permission
existingAccessSection.addPermission(p.toBuilder());
} else {
for (PermissionRule r : p.getRules()) {
// AddPermissionRule
existingAccessSection.upsertPermission(p.getName()).add(r.toBuilder());
}
}
}
});
}
}
/**
* Updates the parent project in the given config.
*
* @param identifiedUser the user
* @param config the config to modify
* @param projectName the project for which to change access.
* @param newParentProjectName the new parent to set; passing null will make this a nop
* @param checkAdmin if set, verify that user has administrateServer permission
*/
public void setParentName(
IdentifiedUser identifiedUser,
ProjectConfig config,
Project.NameKey projectName,
Project.NameKey newParentProjectName,
boolean checkAdmin)
throws ResourceConflictException, AuthException, PermissionBackendException,
BadRequestException {
if (newParentProjectName != null
&& !config.getProject().getNameKey().equals(allProjects)
&& !config.getProject().getParent(allProjects).equals(newParentProjectName)) {
try {
setParent
.get()
.validateParentUpdate(
projectName, identifiedUser, newParentProjectName.get(), checkAdmin);
} catch (UnprocessableEntityException e) {
throw new ResourceConflictException(e.getMessage(), e);
}
config.updateProject(p -> p.setParent(newParentProjectName));
}
}
private boolean isPermission(String name) {
if (Permission.isPermission(name)) {
if (Permission.isLabel(name) || Permission.isLabelAs(name)) {
String labelName = Permission.extractLabel(name);
try {
LabelType.checkName(labelName);
} catch (IllegalArgumentException e) {
return false;
}
}
return true;
}
ImmutableSet<String> pluginPermissions =
pluginPermissionsUtil.collectPluginProjectPermissions().keySet();
return pluginPermissions.contains(name);
}
private boolean isCapability(String name) {
if (GlobalCapability.isGlobalCapability(name)) {
return true;
}
ImmutableSet<String> pluginCapabilities =
pluginPermissionsUtil.collectPluginCapabilities().keySet();
return pluginCapabilities.contains(name);
}
}